I Guess That’s Why They Call It The Blues by Elton John is in C at 120 beats per minute and runs 4:39 across 56 bars. It uses 11 chords — C, Em7, F, G, Bm, B7, Em, G7, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? I Guess That’s Why They Call It The Blues guitar melody tab.